* #6852: audiolayer creation depends only on preference.audioApi

daemon/src/audio/alsa/alsalayer.cpp

daemon/src/audio/audiolayer.cpp

daemon/src/audio/audiolayer.h

daemon/src/audio/pulseaudio/pulselayer.cpp

daemon/src/dbus/configurationmanager-introspec.xml

daemon/src/dbus/configurationmanager.cpp

daemon/src/dbus/configurationmanager.h

daemon/src/global.h

daemon/src/managerimpl.cpp

daemon/src/managerimpl.h

daemon/src/preferences.cpp

daemon/src/preferences.h

daemon/test/audiolayertest.cpp

daemon/test/configurationtest.cpp

gnome/src/config/accountconfigdialog.c

gnome/src/config/audioconf.c

gnome/src/config/audioconf.h

gnome/src/dbus/configurationmanager-introspec.xml

gnome/src/dbus/dbus.c

gnome/src/dbus/dbus.h